06-02-2010, 06:01 AM #
15 edo
******
Drives: E92 335i
Join Date: Nov 2008
Location: hell
Posts: 776 iTrader: (
1)
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I was using 5W-40 Castrol oil for 2,5 years. However, I'm switching to 10W-60 (Castrol TWS) tomorrow.
I have spoken to many people that know A LOT about engines and oil - from BMW's head of technical department to rally racers. For a turbo engine 10W-60 is way better as turbo engines produce much more heat than NA engines. I drive really hard, my oil temperature reaches 240-260F or even more quite often, even though I've got aftermarket oil cooler installed. That is why all of the people suggested to use 10W-60 - it handles high temperatures much better. 5W-40 loses it's lubricating characteristics when it gets really hot. 10W-60 doesn't.
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